$390+ Cheap flights from Houston to Porto (OPO)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — OPO
May 22 — May 291
Round-trip
1 adult, Economy
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Find cheap flights from Houston to Porto with Cheapflights
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Cheapest flights from Houston to PortoExplore the most affordable flight options available from Houston to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 22, 2026.
Explore the most affordable flight options available from Houston to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 22, 2026.
This Turkish Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/159:05 pm
IAH
- OPO
1 stop20h 25m
Turkish Airlines
Thu 9/2411:00 am
OPO
- IAH
1 stop31h 45m
Turkish Airlines
Deal found 4/17![Turkish Airlines logo]()
$712
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/272:30 pm
IAH
- OPO
1 stop19h 20m
Turkish Airlines
Tue 5/124:50 pm
OPO
- IAH
1 stop32h 20m
Turkish Airlines
Deal found 4/20![Turkish Airlines logo]()
$719
This FlightHub deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/89:05 pm
IAH
- OPO
1 stop36h 35m
Turkish Airlines
Tue 9/2210:40 am
OPO
- IAH
1 stop38h 30m
Turkish Airlines
Deal found 4/17![Turkish Airlines logo]()
$737
This Turkish Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/99:05 pm
IAH
- OPO
1 stop30h 35m
Turkish Airlines
Thu 8/276:10 am
OPO
- IAH
1 stop19h 00m
Turkish Airlines
Deal found 4/17![Turkish Airlines logo]()
$760
This Air France deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/143:55 pm
IAH
- OPO
1 stop17h 30m
Multiple Airlines
Wed 10/2811:15 am
OPO
- IAH
1 stop32h 15m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$766
This Travelocity deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:19 pm
HOU
- OPO
2 stops15h 41m
Iberia
Wed 10/288:40 pm
OPO
- HOU
2 stops20h 43m
Iberia
Deal found 4/21![Iberia logo]()
$787
This American Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:50 pm
IAH
- OPO
2 stops15h 10m
American Airlines
Wed 10/288:40 pm
OPO
- IAH
2 stops21h 39m
American Airlines
Deal found 4/21![American Airlines logo]()
$787
This Lufthansa deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/294:30 pm
IAH
- OPO
1 stop16h 45m
Lufthansa
Tue 1/512:30 pm
OPO
- IAH
2 stops17h 44m
Lufthansa
Deal found 4/18![Lufthansa logo]()
$792
This FlightHub deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/294:30 pm
IAH
- OPO
1 stop16h 45m
Lufthansa
Wed 1/64:05 pm
OPO
- IAH
1 stop28h 05m
Lufthansa
Deal found 4/18![Lufthansa logo]()
$802
This KAYAK deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3012:10 pm
IAH
- OPO
2 stops17h 30m
Lufthansa
Tue 1/512:30 pm
OPO
- IAH
1 stop31h 40m
Lufthansa
Deal found 4/18![Lufthansa logo]()
$808
This Expedia deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:19 pm
HOU
- OPO
2 stops15h 41m
Iberia
Wed 10/2112:25 pm
OPO
- HOU
2 stops17h 28m
Iberia
Deal found 4/20![Iberia logo]()
$837
This KLM deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/161:00 pm
HOU
- OPO
2 stops14h 05m
KLM
Thu 12/2411:00 am
OPO
- HOU
2 stops16h 43m
KLM
Deal found 4/20![KLM logo]()
$923
Best flights from Houston to PortoDiscover carefully curated flight deals from Houston to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 22, 2026.
Discover carefully curated flight deals from Houston to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 22, 2026.
This KLM deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1712:55 pm
IAH
- OPO
1 stop15h 25m
KLM
Thu 10/227:10 pm
OPO
- IAH
1 stop24h 05m
KLM
Deal found 4/21![KLM logo]()
$816
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1712:55 pm
IAH
- OPO
2 stops20h 30m
Delta
Thu 10/225:00 am
OPO
- IAH
2 stops19h 28m
Delta
Deal found 4/21![Delta logo]()
$830
This United Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/172:50 pm
IAH
- OPO
1 stop12h 55m
United Airlines
Thu 10/2212:35 pm
OPO
- IAH
1 stop14h 13m
United Airlines
Deal found 4/20![United Airlines logo]()
$833
This oojo deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/171:08 pm
HOU
- OPO
2 stops20h 52m
Iberia
Wed 10/2112:25 pm
OPO
- HOU
2 stops17h 28m
Iberia
Deal found 4/21![Iberia logo]()
$1,021
This KLM deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1712:55 pm
IAH
- OPO
1 stop15h 25m
KLM
Wed 10/217:10 pm
OPO
- IAH
1 stop24h 05m
KLM
Deal found 4/21![KLM logo]()
$816
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1712:55 pm
IAH
- OPO
2 stops20h 30m
Delta
Wed 10/215:00 am
OPO
- IAH
2 stops19h 17m
Delta
Deal found 4/21![Delta logo]()
$831
This Delta deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/62:20 pm
IAH
- OPO
2 stops19h 05m
Delta
Thu 5/145:00 am
OPO
- IAH
1 stop14h 20m
Delta
Deal found 4/19![Delta logo]()
$919
This KLM deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:00 pm
IAH
- OPO
2 stops15h 30m
KLM
Mon 5/1111:25 am
OPO
- IAH
1 stop31h 55m
KLM
Deal found 4/17![KLM logo]()
$924
This Delta deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/252:35 pm
IAH
- OPO
2 stops18h 50m
Delta
Fri 10/25:55 am
OPO
- IAH
2 stops18h 57m
Delta
Deal found 4/19![Delta logo]()
$977
This KAYAK deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/174:15 pm
HOU
- OPO
2 stops17h 45m
Iberia
Fri 7/3112:25 pm
OPO
- HOU
2 stops17h 34m
Iberia
Deal found 4/19![Iberia logo]()
$1,333
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/66:00 am
HOU
- OPO
2 stops22h 40m
Delta
Thu 7/165:00 am
OPO
- HOU
2 stops22h 51m
Delta
Deal found 4/17![Delta logo]()
$1,026
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/810:05 am
HOU
- OPO
2 stops23h 20m
Delta
Tue 9/225:00 am
OPO
- HOU
2 stops22h 35m
Delta
Deal found 4/17![Delta logo]()
$1,044
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/225:14 pm
HOU
- OPO
2 stops23h 01m
Delta
Tue 7/76:15 am
OPO
- HOU
2 stops21h 36m
Delta
Deal found 4/20![Delta logo]()
$1,168
This Delta deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/36:00 am
HOU
- OPO
2 stops22h 40m
Delta
Tue 6/26:15 am
OPO
- HOU
2 stops22h 11m
Delta
Deal found 4/18![Delta logo]()
$1,201
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/11:06 pm
HOU
- OPO
2 stops15h 24m
Delta
Mon 6/85:00 am
OPO
- HOU
2 stops22h 53m
Delta
Deal found 4/17![Delta logo]()
$1,230
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/310:27 am
HOU
- OPO
2 stops22h 58m
Delta
Wed 6/1011:45 am
OPO
- HOU
2 stops27h 29m
Delta
Deal found 4/21![Delta logo]()
$1,351
This Delta deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/46:00 am
HOU
- OPO
2 stops20h 30m
Delta
Thu 6/115:00 am
OPO
- HOU
2 stops22h 53m
Delta
Deal found 4/19![Delta logo]()
$1,366
Last-minute flights from Houston to PortoDiscover last-minute flight deals from Houston to Porto. Data last updated April 22, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Porto. Data last updated April 22, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/272:30 pm
IAH
- OPO
1 stop19h 20m
Turkish Airlines
Tue 5/124:50 pm
OPO
- IAH
1 stop32h 20m
Turkish Airlines
Deal found 4/20![Turkish Airlines logo]()
$719
This Mytrip deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/272:30 pm
IAH
- OPO
2 stops24h 50m
Multiple Airlines
Tue 5/1210:00 pm
OPO
- IAH
2 stops27h 10m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$853
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/273:50 pm
IAH
- OPO
1 stop17h 35m
Delta
Tue 5/125:00 am
OPO
- IAH
1 stop14h 20m
Delta
Deal found 4/21![Delta logo]()
$914
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/275:23 pm
HOU
- OPO
2 stops16h 02m
Delta
Tue 5/125:00 am
OPO
- HOU
2 stops23h 26m
Delta
Deal found 4/21![Delta logo]()
$928
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/35:23 pm
HOU
- OPO
2 stops22h 52m
Delta
Tue 6/26:15 am
OPO
- HOU
2 stops22h 11m
Delta
Deal found 4/20![Delta logo]()
$1,201
This KLM deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/43:25 pm
IAH
- OPO
1 stop20h 45m
KLM
Mon 5/1111:25 am
OPO
- IAH
1 stop31h 55m
KLM
Deal found 4/17![KLM logo]()
$919
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/48:05 am
IAH
- OPO
2 stops20h 35m
Delta
Fri 5/225:00 am
OPO
- IAH
1 stop14h 20m
Delta
Deal found 4/21![Delta logo]()
$923
This oojo deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/44:18 pm
HOU
- OPO
2 stops21h 42m
Iberia
Fri 5/228:40 pm
OPO
- HOU
2 stops33h 19m
Iberia
Deal found 4/21![Iberia logo]()
$1,198
This Delta deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/410:53 am
HOU
- OPO
2 stops22h 32m
Delta
Fri 5/85:00 am
OPO
- HOU
2 stops23h 26m
Delta
Deal found 4/18![Delta logo]()
$1,250
This Delta deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/62:20 pm
IAH
- OPO
2 stops19h 05m
Delta
Thu 5/145:00 am
OPO
- IAH
2 stops21h 00m
Delta
Deal found 4/19![Delta logo]()
$928
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/610:53 am
HOU
- OPO
2 stops22h 32m
Delta
Tue 5/125:00 am
OPO
- HOU
2 stops23h 26m
Delta
Deal found 4/21![Delta logo]()
$980
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2810:27 am
HOU
- OPO
2 stops18h 03m
Delta
Fri 6/55:55 am
OPO
- HOU
2 stops22h 31m
Delta
Deal found 4/20![Delta logo]()
$1,238
One-way flights from Houston to PortoSearch for one-way flight options from Houston to Porto. Find affordable one-way fares based on user searches. Data last updated April 22, 2026.
Search for one-way flight options from Houston to Porto. Find affordable one-way fares based on user searches. Data last updated April 22, 2026.
This KLM deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/281:00 pm
HOU
- OPO
2 stops15h 30m
KLM
Deal found 4/20![KLM logo]()
$390
This KLM deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/283:55 pm
IAH
- OPO
1 stop17h 30m
KLM
Deal found 4/20![KLM logo]()
$390
This Kiwi.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/146:50 am
IAH
- OPO
3 stops52h 55m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$393
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/271:00 pm
HOU
- OPO
2 stops20h 30m
Delta
Deal found 4/20![Delta logo]()
$395
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2712:55 pm
IAH
- OPO
2 stops20h 35m
Delta
Deal found 4/20![Delta logo]()
$395
This Booking.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/16:25 pm
IAH
- OPO
2 stops54h 35m
Air Canada
Deal found 4/20![Air Canada logo]()
$398
This Kiwi.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/76:07 pm
IAH
- OPO
3 stops54h 48m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$430
This Kiwi.com deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/36:30 am
IAH
- OPO
3 stops56h 35m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$438
This Kiwi.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/46:07 pm
IAH
- OPO
2 stops55h 03m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$444
This KAYAK deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:25 pm
IAH
- OPO
2 stops33h 20m
Brussels Airlines
Deal found 4/18![Brussels Airlines logo]()
$445
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:00 am
HOU
- OPO
2 stops22h 30m
Delta
Deal found 4/20![Delta logo]()
$450
This KLM deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/241:15 pm
IAH
- OPO
2 stops15h 15m
KLM
Deal found 4/20![KLM logo]()
$450
Find flight deals from Houston to Porto
Discover tips and strategies to find the most affordable flight options for your journey from Houston (HO1) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 22, 2026.
Round-trip from | $712 (Turkish Airlines) |
|---|---|
One-way from | $390 (KLM) |
Popular in | July |
Cheapest in | February |
Average price | $624 |
Cheapflights Fare Finder
Customize your flight search to find flights from Houston to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 22, 2026.
Use the filters below to find and compare flights from Houston to Porto that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Sat 10/17
12:55 pm-10:20 am
1 stop15h 25m
Porto
Thu 10/22
7:10 pm-1:15 pm
1 stop24h 05m
$816
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Sat 10/17
12:55 pm-10:20 am
1 stop15h 25m
Porto
Wed 10/21
7:10 pm-1:15 pm
1 stop24h 05m
$816
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Sat 10/17
12:55 pm-3:25 pm
2 stops20h 30m
Porto
Thu 10/22
5:00 am-6:28 pm
2 stops19h 28m
$830
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Sat 10/17
12:55 pm-3:25 pm
2 stops20h 30m
Porto
Wed 10/21
5:00 am-6:17 pm
2 stops19h 17m
$831
Quickest round-trip
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Sat 10/17
2:50 pm-9:45 am
1 stop12h 55m
Porto
Thu 10/22
12:35 pm-8:48 pm
1 stop14h 13m
$833
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Wed 5/6
2:20 pm-3:25 pm
2 stops19h 05m
Porto
Thu 5/14
5:00 am-1:20 pm
1 stop14h 20m
$919
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Mon 5/4
6:00 pm-3:30 pm
2 stops15h 30m
Porto
Mon 5/11
11:25 am-1:20 pm
1 stop31h 55m
$924
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Fri 9/25
2:35 pm-3:25 pm
2 stops18h 50m
Porto
Fri 10/2
5:55 am-6:52 pm
2 stops18h 57m
$977
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Sat 10/17
1:08 pm-4:00 pm
2 stops20h 52m
Porto
Wed 10/21
12:25 pm-11:53 pm
2 stops17h 28m
$1,021
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Mon 7/6
6:00 am-10:40 am
2 stops22h 40m
Porto
Thu 7/16
5:00 am-9:51 pm
2 stops22h 51m
$1,026
Showing 1-10 of 35 resultsSorted by cheapest first
Best time to book a flight from Houston to Porto
Have a flexible travel schedule? Discover the best time to fly to Porto from Houston with our price prediction graph.
HO1-OPO
HOU-OPO
IAH-OPO
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Houston to Porto
HO1-OPO
HOU-OPO
IAH-OPO
What is the cheapest month to book a flight from Houston to Porto?
Currently, March is the cheapest month in which you can book a flight from Houston to Porto (average of $476). Flying from Houston to Porto in June is currently the most expensive (average of $1,201). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Houston to Porto?
Reviews of airlines servicing Porto
Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated April 22, 2026.
Peruse reviews from past customers who have flown with KLM,United Airlines, andLufthansa from Houston to Porto to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.1
Boarding
7.8
Overall
7.8
Comfort
7.7
Crew
8.4
Food
7.3
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2026
EZE - SCL
Entertainment
7.1
Boarding
7.8
Overall
7.8
Comfort
7.7
Crew
8.4
Food
7.3
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2026
EZE - SCL
Entertainment
7.1
Boarding
7.8
Overall
7.8
Comfort
7.7
Crew
8.4
Food
7.3
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2026
EZE - SCL
Entertainment
7.1
Boarding
7.8
Overall
7.8
Comfort
7.7
Crew
8.4
Food
7.3
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2026
EZE - SCL
Related info for your journey
Find useful and relevant information for your journey from Houston to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsVila Nova de Gaia
Aveiro
Arcos de Valdevez
Coimbra
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Complete your trip
Complete your trip to Porto by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Houston to Porto by cabin class
Find flights from Houston to Porto, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Houston and Porto flights
Browse other Houston and Porto flight options. Last updated on April 22, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Porto
Explore flights to Porto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on April 22, 2026.
Top 3 airlines flying from Houston to Porto
Discover the top 3 airlines that operate flights from Houston to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$476 | Average$749 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$593 | Average$989 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$831 | Average$1,404 | FlexibilityNo cancel fee | On-time76% |